作者： Jakub Rusinowski · 最后更新： 2026年7月12日
Yes, comfortably — you'll have ~3 GB of headroom running Qwen 3 8B at Q4_K_M (4.950749999999999 GB, ~59 tok/s (est.)) with room for up to 8K context.
or compare on Vast.ai from $0.35/hr (typical low · varies)
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| VRAM | 8 GB |
| Memory Bandwidth | 448 GB/s |
| Quant | VRAM needed | Fits 8 GB? | Max context |
|---|---|---|---|
| F16 | 17.8 GB | ✗ No | — |
| Q8_0 | 10.1 GB | ✗ No | — |
| Q6_K | 8.1 GB | ✗ No | — |
| Q5_K_M | 7.2 GB | ✓ Yes | 8K |
| Q4_K_M | 6.4 GB | ✓ Yes | 8K |
| Q3_K_M | 4.9 GB | ✓ Yes | 16K |
| Q2_K | 4.1 GB | ✓ Yes | 16K |
VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 8 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.
| Qwen 3 8B | Q4_K_M · 4.950749999999999 GB · ~59 tok/s (est.) |
At 2 hrs/day, buying (~$299) beats renting at $0.34/hr after about 15 months.
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Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.
Yes, comfortably — you'll have ~3 GB of headroom running Qwen 3 8B at Q4_K_M (4.950749999999999 GB, ~59 tok/s (est.)) with room for up to 8K context.
Qwen 3 8B at Q4_K_M quantization (4.950749999999999 GB), estimated ~59 tokens/sec, up to 8K context.
| Size | VRAM | Verdict | Speed |
|---|---|---|---|
| Qwen 3 235B-A22B (MoE) | 141.9 GB | Does not fit | — |
| Qwen 3 32B | 19.8 GB | Does not fit | — |
| Qwen 3 30B-A3B (MoE) | 18.4 GB | Does not fit | — |
| Qwen 3 14B | 8.9 GB | Runs at Q2_K | — |
| Qwen 3 8B | 5.0 GB | Runs | ~59 tok/s |
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